Integrated electric vehicle heat pump air conditioning system and control method thereof

Abstract

The invention provides an integrated electric vehicle heat pump air conditioning system and a control method thereof. A warm air temperature control loop is arranged in a vehicle cabin, and air in thevehicle cabin is heated by using a warm air core and a heater in the warm air temperature control loop, so that a heat pump air conditioner does not need to use an out-vehicle heat exchanger, a situation that the out-vehicle heat exchanger is frosted in winter is avoided, and the continuity of in-vehicle heating in winter is guaranteed. In addition, through the use of a first heat exchanger, theheat pump air conditioner and a motor temperature control loop can communicate into a whole, heat generated by a motor can be recovered, the energy loss is avoided, and the temperature adjustment efficiency of the motor and a battery is improved by utilizing operation of cooling the motor through the heat pump air conditioner.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to an integrated electric vehicle heat pump air-conditioning system and a control method thereof. Background technique [0002] At present, electric vehicles basically include three temperature adjustment devices. [0003] The first is the air conditioner used to adjust the temperature inside the car and improve the comfort of the passengers in the car; [0004] The second is a device for temperature regulation of the battery pack, because the temperature of the battery pack must be within an appropriate range before it can work normally; [0005] The third is a device used to adjust the temperature of the motor. Like the battery pack, the temperature of the motor must be within an appropriate range before it can work normally. [0006] In the above-mentioned temperature regulating device in the prior art, there are following problems: [0007] (1) The heat exchanger ...

AI Technical Summary

Problems solved by technology

[0007] (1) The heat exchanger outside the car is used in the temperature adjustment process of the car, which is prone to frost in winter, and when the heat exchanger outside the car is defrosting, it cannot heat the air inside the car at the same time, which affects the temperature of the passengers in the car. comfort of car occupants

[0008] (2) Since the three temperature adjustment devices work independently of each other, the heat production between them cannot communicate with each other

For example, during the driving of an electric vehicle, the heat pump air conditioner is heating the cabin by consuming energy, while the motor will dissipate heat when it is running. This part of the heat is not effectively used, but directly lost, which will cause energy waste.

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